Pattern-chain-feeding mechanism for looms



Sept. 15,1925. v 1,553,558 v E. H. RYON PATTERN CHAIN FEEDIN G MECHANISM FOR LOOKS Filed um 11, 1922 s Sheets-Sheet 1 Sept. 15, 1925. 1,553,558

E. H. RYON PATTERN CHAIN FEEDING MECHANISM FOR LOOKS Fild ma 11 1922 sSheets-sneez 2 Sept. 1 5, 1925.

5 1,553,558 E. H. RYON 1 I PATTERN CHAIN FEEDING MECHANISM FOR LOOMS Filed May 11, .1922 s Sheets-Sheet '3 Patented Sept. 15, 1925.

UNITED STATES PA ENT OFFICE.

EPPA H. nYon, or WALTI-IAM, MASSACHUSETTS, ASSIGNOR- To onoMrTon & KNOWLES LOOM wonxs, A oonronATIon on MASSACHUSETTS.

PATTERN-CHAIN-FEEDING MECHAN I-S M FOR L OOMS.

Application filed May 11, 1922. Serial No. 360,211.

To all whom it may concern:

Be it known that I, EIPA H. RYON, a citizen of the United States, residing at "Waltham, in the county of Middlesex and State of Massachusetts, have invented a new and useful Pattern-'Ghain-Feeding Mechanism for Looms, of which the following is a specification.

This invention relates to pattern chain feeding mechanism for looms, particularly adapted to looms of the Moquette type. In such looms the pattern chain by which the yarn spools are carried is frequently of very considerable length and of great weight and this chain must be intermittently advanced between two successive beats of the lay.

It is one object of my invention to provide improved devices for thus intermittently advancing the chain, having particular reference to convenient reversal of the direction of movement and to provision for preventing simultaneous operation of opposed feeding members.

Another object of my invention is to provide a convenient controlling device by which the direction of feed may be reversed from either side of the loom. Such reversal of the chain motion is not infrequently desired by the weaver in correcting mispicks or other defects in the weave.

It is also an object of my invention to provide feeding means simultaneously operative on the pattern chain at separated points in its length, whereby movement of a long heavy chain as a unit under tension is facilitated. I have also provided an arrangement and assembly of the several parts of the chain and its feeding mechanism by which convenient access to the back of the loom is permitted.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

A preferred form of my invention is shown in the drawings, in which,

Fig. 1 is a side elevation of parts of a Moque'tte loom embodying my invention;

Fig. 2 is a front elevation of a pattern feeding mechanism therefor;

Fig. 3 is an enlarged side elevation of a portion of the loom frame and the feedingmechanism Fig. 4 is a left hand side elevation of the feeding and reversing mechanism;

Fig. 5 is a 'front elevation of the parts shown in Fig. 4:;

Figs. 6 and 7 are detail sectional side elevations taken along the lines 66 and 77 in Fig. 5 and showing certain parts in different positions;

Fig. 8 is a sectional View taken along the line 8-8 in Fig. 4; and

Fig. 9 is a detail sectional view taken on the line 99 in Fig. 7

Referring to Fig. 1, I have shown parts of a Moquette loom including a loom frame 10, a pattern spool chain indicated by a broken line at 11, a framework 12 supporting a series of upper guide rolls 13, lower guide rolls 14, and also a series of larger guide pulleys 15 disposed below the upper" run of the chain which is supported on the rollers 13. The chain, as shown in Fig. 1, passes over the upper rolls 13 and has its lower run supported in loops between the guide rolls 14 and the pulleys 15.

The rolls 14 adjacent the rear of the loom are mounted on a raised portion 12 0f the frame 12, so as to provide a passage 16 at the rear of the loom, permitting convenient access to the warp beam 17 and to other por-.

tions of the loom mechanism. This arrangem'ent of the pattern chain and its supports contributes greatly to the convenient inspecing arms 24 and 25 are mounted on the hubs of the ratchet wheels 22 and 23, the two sides of the arms being secured together in spaced relation by studs or rivets 26 as indicated in Fig. 9.

Feed pawls 27 and 28 are mounted to swing between the sides of the arms 24 and 25 and are provided with tension springs 29 acting to move the pawls toward the ratchet wheels. Links 30 (Fig. 3) connect the arms 24 and 25 to a bell crank or bent lever 31 pivoted on the loom slde at 32 and having a cam roll 33 positioned in the groove of a side cam 34 mounted on the bottom or cam shaft 35 of the loom. As this shaft is continuously rotated, the arms 24 and 25 are simultaneously swung forward and rear ward about the axis of the shaft 20.

The feed pawls 27 and 28 are provided with rollers 36 engaging the opposite outer edges of a reversing arm 38 mounted upon a fixed pivot 39 at the rear of the shaft 20. The arm 38 is made in two parts for convenience in assembling and is provided with an elongated slot 40 through which the shaft 20 extends, the slot permitting swinging movement of the arm without interference by the shaft 20. The outer end of the arm 38 is connected by a link 41 to an arm 42 fixed to a cross rod 43 mounted in brackets 44 extending upward from the arch of the loom frame.

The rod 43 extends entirely across the loom and is provided with a convenient handle 45 at each end thereof. The left hand bracket 44 has a forwardly extending projection 46 having a plurality of holes 47 therein, each adapted to receive a stud 48 fixed in the arm 42. A spring 49 is compressed between the left hand bracket 44 and a collar 50 on the rod 43. A collar 52 (Fig. 2) limits movement of the rod 43 to the left.

The operation of this feeding and rovers ing mechanism is as follows: The arms 24 and 25 with their feed pawls 27 and 28 are simultaneously swung rearward for a feeding movement at each rotation of the cam shaft 35. The cam rolls 36 on the pawls engage the opposite edges of the reverse arm 38, which edges are so spaced that only one of the pawls can engage its ratchet wheel in any single position of the arm 38.

In Fig. 4 the arm 38 is shown in its lowest position. with the upper pawl 27 engaging the ratchet wheel 22. In Fig. 6 the arm 38 is in mid position and the feed is stopped, as neither pawl can engage its ratchet wheel. In Fig. 7 the arm 38 is raised and the pawl 27 is inoperative, while the pawl 28 (not shown in Fig. 7) is operative to feed the chain forward in its normal direction.

In order to move the arm 38 to its different positions, the rod 43 is first moved to the left. compressing the spring 49 and withdrawing the stud 48 from the openings in the projection 46. The arm is then raised or lowered by swinging the handle 45 and is then permitted to return to the right, entering the stud 48 in the desired opening 47. It will be seen that the arm 42 and the connested reverse arm 38 may thus be positively locked in any one of three positions and that the reverse mechanism may be released and adjusted as desired from either side of the loom. It will further be evident that it is impossible to so adjust the feeding mechanism that both feed pawls 27 and 28 are simultaneously operative. Breakage of the feeding mechanism is thus prevented.

It will also be noted that the reverse arm 38 does not swing about the axis of the shaft 20 but about a pivot 39 spaced a substantial distance away from the axis, this arrangement being found to possess substantial advantages. to the reverse arm 38 and also to the arm 42 so that the ratio of movement of the arm 38 may be considerably varied with respect to the fixed movement of the arm 42.

As has been previously stated, the pattern chain on a Moquette loom is commonly of very considerable length and in wide carpet or rug looms it is of great weight, in some cases amounting to several tons. Also in the type of loom herein shown, the chain is held under tension throughout its length and very considerable power is required to advance the chain intermittently between the successive beats of the lay. Accordingly, I have provided means for simultaneously feeding the chain at two or more separated points.

In Fig. 1, I have shown feeding mechanism as described for rotating the shaft 20 and the driving pulleys thereon and I have also shown similar mechanism. for rotating a pair of the large guide rolls or pulleys 15*. For this purpose feed arms 60 are mounted to swing about the axis of the roll shaft 61 and are connected by adjustable links 62 to a bell crank 63 pivoted on the loom frame at 64 and connected by an adjustable link 65 to a cam lever 66 having a guide roll 67 positioned in the groove of a side face cam 68 on the shaft 35.

As the cams 34 and 68 are mounted on the same shaft 35, they rotate together and the feed arms for the rolls 21 and for the pulleys 15 receive simultaneous swinging movements. The size of the cam 68 and the proportions and leverage of the different parts are worked out with reference to the difference in size in the feed rolls 21 and 15*, so that the advance movement of the chain is the same for each roll. A reverse arm 69 is mounted on a fixed pivot 69 and is connected by a link 7 0, bell crank 71, link 72, bell crank 7 3 and link 74 to the arm 42 previously described, so that the stopping or The link 41 is adjustably secured" reversal of the feed will be simultaneous for both feeding devices. The links 62 are also made adjustable in length so that one of the feed pawls for the rolls 15 may engage its ratchet simultaneously with the corresponding pawl 27 or 28.

I am thus enabled to drive a heavy pattern chain as a unit under tension at two or more widely separated points in its length, thereby distributing the strain both on the chain and on the driving mechanism. 5

Having thus described my invention and the advantages thereof, I do not wish to be limited to the specific details herein disclosed otherwise than as set forth in the claims, but what I claim is 1. A pattern spool chain feeding mechanism for carpet looms, comprising a feed shaft, ratchet mechanism fixed thereto, oppositely disposed feed pawls for said mechanism, a pivoted control arm extending between said pawls, said pawls and arm having directly engaging portions, and manual means to raise and lower said arm, to render said pa-wls selectively operative.

2. A pattern spool chain feeding mechanism for carpet looms, comp-rising a feed shaft, ratchet mechanism fixed thereto, oppositely disposed feed pawls for said mechanism, a control arm pivoted on an axis spaced from said shaft, and extending between said pawls, said arm being slotted transversely for passage of said shaft and having cam portions engaged by said pawls and being effective to thereby move one pawl to operative position and the other pawl to inoperative position.

3. A pattern spool chain feeding mechanism for carpet looms comprising a feed shaft, devices to intermittently rotate said shaft in either direction, and manual means to render either one of said devices operative and the other inoperative, said means comprising a rod extending transversely of the loom, and handles on said rod at each side of the loom by which said rod may be turned to reverse said pawls.

4. A pattern spool chain feeding mechanism for carpet looms, comprising a feed shaft, devices to intermittently rotate said shaft in either direction, and manual means to render either one of said devices operative and the other inoperative, said means comprising a longitudinally movable rod, a handle fixed thereto, a locking device released by longitudinal movement of said rod, and connections from said rod to said pawls.

5. A pattern spool chain feeding mechanism for carpet looms, comprising a feed shaft, devices to intermittently rotate said shaft in either direction, and manual means to render either one of said devices operative and the other inoperative, said means comprising a longitudinal movable rod, a locking device therefor, a spring to yieldingly move said rod to locked position, connections from said rod to said pawls, and manual means to move said rod longitudinally to unlocked position, and to turn said rod to reverse said pavvls.

6. In a Moquette loom, a pattern spool chain, a plurality of rotatable members supporting said chain in a series of loops under tension, said means comprising separate intermittently acting devices engaging said chain at substantially separated points in its length, a continuously rotated driving shaft and separate driving connections from said shaftto each of said intermittently acting devices.

7. In a Moquette loom, a pattern spool chain, a plurality of rotatable members supporting said chain in a series of loops under tension, said means comprising separate intermittently acting devices engaging said chain at substantially separated points in its length, a continuously rotated driving shaft, a plurality of cams fixed on said shaft, and separate driving connections from each of said cams to one of said intermittently acting devices associated therewith.

8. In a Moquette loom, a pattern spool chain, a plurality of rotatable members supporting said chain in a series of loops under tension, said means comprising separate intermittently acting devices engaging said chain at substantially separated points in its length, a continuously rotated shaft, separate driving connections from said shaft to each of said intermittently acting devices, and means to reverse the operation of said devices while said driving shaft continues to rotate in one direction.

In testimony whereof I have hereunto affixed my signature.

EPPA H. RYON. 

